CN202643860U - Reliability-improved aluminum electrolysis industry power supply system - Google Patents

Abstract

The utility model relates to a reliability-improved aluminum electrolysis industry power supply system which comprises a double-inlet-wire and double-bus with bus couple power supply system. The reliability-improved aluminum electrolysis industry power supply system is characterized in that two section gaps used for trouble shooting in section mode are arranged on a 220 kV II bus, the 220 kV II bus is divided into three sections of buses, and a rectifier unit is connected onto each of the three section buses of the divided 220 kV II bus. The reliability-improved aluminum electrolysis industry power supply system reduces cell shutting risks, improves power supply safety of the 220 kV rectifying station power supply system, aluminum electrolysis power supply efficiency and safety, reliability and stability of electrolytic aluminum production direct current power supply, avoids possibility of rectifier unit full cut-off, reduces effect on aluminum electrolysis production caused by gas insulated switch (GIS) breaker trouble shooting and work load of workers caused by power failure and cell shutting of an electrolytic plant, and simultaneously reduces enormous economic loss caused by the full cut-off possibility and the effect. The reliability-improved aluminum electrolysis industry power supply system can meet technical condition requirements of whole aluminum electrolysis production.

Description

A kind of electrolysis of aluminum industry power supply system that improves reliability

Technical field

The utility model relates to a kind of power supply system that the electrolysis of aluminum industry is used 220kV commutation supply voltage reliability that improves.

Background technology

220kV rectifier power supply system plays very important effect in the Aluminium Electrolysis process.It directly provides energy for Aluminium Electrolysis, guarantees that the power supply of Aluminium Electrolysis safety and steady is that the electrolysis of aluminum industry needs the technical barrier of capturing for a long time always.In the Aluminium Electrolysis process, can not power by safety and steady such as 220kV rectifier power supply system, not only energy consumption increases, and also will have great security risk, causes the tremendous economic loss.

At present, the wiring system that electrolysis of aluminum industry 220kV rectifier power supply system GIS switching station adopts is shown in the wiring system (such as Fig. 1) of two inlet wires, double-bus band mother.Its compact equipment, succinct can provide multiple operation scheme.

Although 220kV rectifier power supply system has the performance of above-mentioned excellence at present.But because the gas-insulated metal-enclosed switchgroup of GIS() arc suppressing transformer of equipment adopt the self-energy quenching arc mode of SF6 gas-insulated arc extinguishing, formed by a plurality of independent SF6 gas work sealed gas chambers, be prone to SF6 gas leakage fault, must be two sections 220kV bus full cut-off electricity when maintenance.Such as the gas leakage of two groups of isolator SF6 of a certain rectifier unit GIS bus bar side air chamber, need maintenance, just 220kV I, II bus must be had a power failure, so just cause aluminium electrolysis shop DC power-supply system full cut-off electricity, make electrolyzer temperature fast-descending, ionogen, solid, the electrolyzer damage of aluminium water-setting, will cause huge financial loss.

Therefore, want spread GIS to use in 220kV rectifier power supply system, the primary problem that solves is exactly how to make power supply system (GIS) not affect the normal production power supply of aluminium electrolysis shop when maintenance, the utility model is for this industry issue, comprehensively study, well solved this technical problem.

Summary of the invention

The purpose of this utility model is the deficiency that solves the existing above-mentioned existence of 220kV rectifier power supply system, and a kind of safer reliable electrolysis of aluminum industry 220kV rectifier power system is provided.

The utility model improves GIS switching station mode of connection according to environment for use and the condition of 220kV rectifier power supply system.Its improved system architecture is: increase by two section gaps at 220kV II section bus, make 220kV II section bus become 3 sectionalized busbars.When two groups of disconnector cabinet air leakage maintenance of a certain rectifier unit GIS isolating switch bus side, when the bus that connects need have a power failure, can guarantee on other two sections sectionalized busbars with rectifier unit continue operation, produce required normal current or insulation electric current to guarantee electrolyzer.Thereby improved the safe reliability of rectifier power supply system.

The mode of connection of the present utility model is specific as follows:

Increase by two section gaps (using as the trouble shooting segmentation) at 220kV II section bus, make 220kV II section bus be divided into 3 sectionalized busbars, respectively access several rectifier unit on each sectionalized busbar.

The first paragraph sectionalized busbar of (1) No. 1, No. 2, No. 3 motor-generator set winding 220kV I section buses and II section bus, the first paragraph sectionalized busbar is connected to the voltage transformer I;

The second segment sectionalized busbar of (2) No. 4, No. 5 motor-generator set winding 220kV I section buses and II section bus;

The 3rd section sectionalized busbar of (3) No. 6, No. 7, No. 8 motor-generator set winding 220kV I section buses and II section bus, I section bus is connected to the voltage transformer II; The 3rd sectionalized busbar of II section bus is connected to the voltage transformer III;

(4) No. 1 power changes connect 220kV I section bus and first paragraph sectionalized busbar, No. 2 power become the 3rd section sectionalized busbar that connects 220kV I section bus and II section bus.

After the 3rd sectionalized busbar of II section bus increases the voltage transformer III; when other two groups of voltage transformers are out of service because bus has a power failure; this group voltage transformer can continue to provide protection and measure and use; after a certain power change was out of service because of the bus power failure, an other power becomes can continue the operation for the 10kV system.When all the isolator SF6 air chamber gas leakage of GIS bus bar side need maintenance, when the bus that connects need have a power failure, can cooperate section gap adjust operation mode by the mother interval, guarantee on other two sections sectionalized busbars with 5 to 6 rectifier unit continue operation, so that the required normal current of electrolyzer or insulation electric current to be provided, be unlikely to cause electrolysis direct current system full cut-off electricity.For example:

The utility model has following positively effect compared with the prior art:

1, the utility model has reduced and has stopped the groove risk, on the one hand, has improved 220kV rectifier power supply system Supply Security; On the other hand, improved the electrolysis of aluminum power supplying efficiency.

2, security, reliability, the stationarity of Aluminum Electrolysis Production direct current supply have been improved, solved the possibility of full cut-off rectifier unit, reduced the impact that Aluminium Electrolysis is caused because of the maintenance of GIS circuit breaker failure, alleviate the worker and stopped the workload that groove causes because of potroom, reduced simultaneously the tremendous economic loss that causes because of above-mentioned.

3, the utility model can adapt to the requirement of whole Aluminium Electrolysis technical qualification, and technological innovation is strong, belongs to pioneering both at home and abroad.

Description of drawings

Fig. 1 is the power supply system structural representation of existing electrolysis of aluminum industry 220kV substation.

Fig. 2 is electrolysis of aluminum industry 220kV of the present utility model substation power supply system structural representation.

Among the figure, the 1-1 inlet wire, 2-1 power becomes, 3-voltage transformer I, the 4-2 inlet wire, 5-voltage transformer II, 6-2 power becomes, 7-I section bus, 8-II section bus, 9-voltage transformer III, 10-8 rectifier unit, 11-7 rectifier unit, the 12-6 rectifier unit, 13-5 rectifier unit, 14-bus, the 15-4 rectifier unit, 16-3 rectifier unit, 17-2 rectifier unit, the 18-1 rectifier unit, 19-section switch I, 20-section switch II.

Embodiment

As shown in Figure 2, power supply system of the present utility model is:

1, increases section gap (using as the trouble shooting segmentation) at 220kV II section bus with section switch I 19 and section switch II 20, make 220kV II section bus be divided into 3 sectionalized busbars.

2, respectively access several rectifier unit on each sectionalized busbar, the first paragraph sectionalized busbar of No. 1, No. 2, No. 3 motor-generator set winding 220kV I section buses and II section bus, the I sectionalized busbar is connected to voltage transformer I 3; The second segment sectionalized busbar of No. 4, No. 5 motor-generator set winding 220kV I section buses and II section bus, I section main bus-bar is connected to voltage transformer II 5; The 3rd section sectionalized busbar of No. 6, No. 7, No. 8 motor-generator set winding 220kV I section buses and II section bus, the 3rd sectionalized busbar at II section bus has one group of voltage transformer III 9, when other two groups of voltage transformers were out of service because bus has a power failure, this group voltage transformer can continue to provide protection, measure and use; No. 1 power becomes the first sectionalized busbar that connects 220kV I section bus and II section bus, and No. 2 power becomes the 3rd sectionalized busbar that connects 220kV I section bus and II section bus.

Principle of work:

(1), when two groups of fault isolating switch maintenance of No. 1, No. 2, No. 3 rectifier unit GIS bus bar side need stop bus, be fed to rectifier unit place sectionalized busbar No. 6, No. 7, No. 8 by No. 2 inlet wires of 220kV, connect No. 4, No. 5 rectifier unit place buses by section gap, another section gap disconnects No. 1, No. 2, No. 3 rectifier unit place buses.The one group of voltage transformer III and No. 2 power changes that increase are connected to rectifier unit place sectionalized busbar No. 6, No. 7, No. 8, disconnect again the former I of 220kV, II section bus mother, 220kV I section bus and No. 1, No. 2, No. 3 sectionalized busbars that rectifier unit connects just are in power down mode like this, and No. 4, No. 5, No. 6, No. 7, No. 8 totally 5 rectifier unit can continue operation, so that electrolyzer insulation electric current to be provided.

(2), when No. 4, when two groups of fault isolating switch maintenance of No. 5 rectifier unit GIS bus bar side need stop bus, be fed to No. 1 by No. 1 inlet wire of 220kV, No. 2, No. 3 rectifier unit place sectionalized busbars, No. 2 inlet wires of 220kV are fed to No. 6, No. 7, (the one group of voltage transformer III that increases is connected on No. 6 No. 8 rectifier unit place sectionalized busbars, No. 7, No. 8 rectifier unit place buses), disconnect again the 220kV I, II section bus mother and two section gaps, like this 220kV I section bus and No. 4, No. 5 sectionalized busbar that rectifier unit connects just is in power down mode, and No. 1, No. 2, No. 3, No. 6, No. 7, No. 8 totally 6 rectifier unit can continue operation, so that the electrolyzer normal current to be provided.

(3), when No. 6, No. 7, when two groups of fault isolating switch maintenance of No. 8 rectifier unit GIS bus bar side need stop bus, be fed to No. 1 by No. 1 inlet wire of 220kV, No. 2, No. 3 rectifier unit place sectionalized busbars, connect No. 4 by section gap, No. 5 rectifier unit place sectionalized busbars, No. 1 power change is connected to No. 1, No. 2, No. 3 rectifier unit place sectionalized busbars, another section gap disconnects No. 6, No. 7, No. 8 rectifier unit place sectionalized busbars, disconnect again the 220kV I, II section bus mother, like this 220kV I section bus and No. 6, No. 7, No. 8 sectionalized busbar that rectifier unit connects just is in power down mode, and No. 1, No. 2, No. 3, No. 4, No. 5 totally 5 rectifier unit can continue operation, so that electrolyzer insulation electric current to be provided.

(4), when the maintenance of two groups of fault isolating switches of No. 1 inlet wire GIS of 220kV bus bar side need stop bus, the mode of embodiment during with two groups of fault isolating switches maintenance of No. 1, No. 2, No. 3 rectifier unit GIS bus bar side.

(5), when the maintenance of two groups of fault isolating switches of No. 2 inlet wire GIS of 220kV bus bar side need stop bus, the mode of embodiment during with two groups of fault isolating switches maintenance of No. 6, No. 7, No. 8 rectifier unit GIS bus bar side.

(6), when the maintenance of two groups of fault isolating switches of 220kV bus GIS bus bar side need stop bus, embodiment is with No. 4, No. 5, mode during two groups of fault isolating switches maintenance of rectifier unit GIS bus bar side.

(7), when two groups of fault isolating switches maintenance of No. 1 power transformer breaker GIS bus bar side need stop bus, the mode of embodiment during with two groups of fault isolating switches maintenance of No. 1, No. 2, No. 3 rectifier unit GIS bus bar side.

(8), when two groups of fault isolating switches maintenance of No. 2 power transformer breaker GIS bus bar side need stop bus, the mode of embodiment during with two groups of fault isolating switches maintenance of No. 6, No. 7, No. 8 rectifier unit GIS bus bar side.

Claims (1)

1. electrolysis of aluminum industry power supply system that improves reliability, the power supply system that comprises two inlet wires, the wiring of double-bus band mother, it is characterized in that: two section gaps of using as the trouble shooting segmentation are arranged on the 220kV II section bus, 220kV II section bus is divided into 3 sections buses, rectifier unit is connected to respectively 220kV II section bus is divided on each sectionalized busbar after 3 sections; Concrete connection is as follows:

The first paragraph sectionalized busbar of (1) No. 1, No. 2, No. 3 motor-generator set winding 220kV I section buses and II section bus, the first paragraph sectionalized busbar is connected to the voltage transformer I;

The second segment sectionalized busbar of (2) No. 4, No. 5 motor-generator set winding 220kV I section buses and II section bus;

The 3rd section sectionalized busbar of (3) No. 6, No. 7, No. 8 motor-generator set winding 220kV I section buses and II section bus, I section bus is connected to the voltage transformer II; The 3rd sectionalized busbar of II section bus is connected to the voltage transformer III;

(4) No. 1 power changes connect 220kV I section bus and first paragraph sectionalized busbar, No. 2 power become the 3rd section sectionalized busbar that connects 220kV I section bus and II section bus.

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